Spa shell



FIG. 1 is a first perspective view of the spa shell of the invention;

FIG. 2 is a second perspective view of the spa shell illustrated in FIG.1;

FIG. 3 is a top plan view of the spa shell illustrated in FIG. 1;

FIG. 4 is a first side view of the invention illustrated in FIG. 1; and,

FIG. 5 is a second side view of the spa shell illustrated in FIG. 1.

The broken lines are for illustrative purposes only and form no part ofthe claimed design.

The ornamental design for a spa shell, as shown and described.